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Diffstat (limited to 'gcc-4.4.3/contrib/compare-debug')
-rwxr-xr-x | gcc-4.4.3/contrib/compare-debug | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/gcc-4.4.3/contrib/compare-debug b/gcc-4.4.3/contrib/compare-debug new file mode 100755 index 000000000..9864ee91f --- /dev/null +++ b/gcc-4.4.3/contrib/compare-debug @@ -0,0 +1,144 @@ +#! /bin/sh + +# Compare stripped copies of two given object files. + +# Copyright (C) 2007, 2008, 2009 Free Software Foundation +# Originally by Alexandre Oliva <aoliva@redhat.com> + +# This file is part of GCC. + +# GCC is free software; you can redistribute it and/or modify it under +# the terms of the GNU General Public License as published by the Free +# Software Foundation; either version 3, or (at your option) any later +# version. + +# GCC is distributed in the hope that it will be useful, but WITHOUT +# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY +# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public +# License for more details. + +# You should have received a copy of the GNU General Public License +# along with GCC; see the file COPYING3. If not see +# <http://www.gnu.org/licenses/>. + +rm='rm -f' + +case $1 in +-p | --preserve) + rm='echo preserving' + shift + ;; +esac + +if test $# != 2; then + echo 'usage: compare-debug file1.o file2.o' >&2 + exit 1 +fi + +if test ! -f "$1"; then + echo "$1" does not exist >&2 + exit 1 +fi + +if test ! -f "$2"; then + echo "$2" does not exist >&2 + exit 1 +fi + +suf1=stripped +while test -f "$1.$suf1"; do + suf1=$suf1. +done + +suf2=stripped +while test -f "$2.$suf2"; do + suf2=$suf2. +done + +trap 'rm -f "$1.$suf1" "$2.$suf2"' 0 1 2 15 + +cp "$1" "$1.$suf1" +strip "$1.$suf1" + +cp "$2" "$2.$suf2" +strip "$2.$suf2" + +if cmp "$1.$suf1" "$2.$suf2"; then + status=0 +else + status=1 + + # Assembler-generated CFI will add an .eh_frame section for -g not + # present in -g0. Try to cope with it by checking that an .eh_frame + # section is present in either object file, and then stripping it + # off before re-comparing. + + cmd= + cmp1= + cmp2= + + for t in objdump readelf eu-readelf; do + if ($t --help) 2>&1 | grep -e '--\[*section-\]*headers' > /dev/null; then + cmd=$t + + $cmd --section-headers "$1.$suf1" | grep '\.eh_frame' > /dev/null + cmp1=$? + + $cmd --section-headers "$2.$suf2" | grep '\.eh_frame' > /dev/null + cmp2=$? + + break + fi + done + + # If we found .eh_frame in one but not the other, or if we could not + # find a command to tell, try to strip off the .eh_frame section + # from both. + if test "x$cmp1" != "x$cmp2" || test "x$cmd" = "x"; then + suf3=$suf1. + while test -f "$1.$suf3"; do + suf3=$suf3. + done + + suf4=$suf2. + while test -f "$2.$suf4"; do + suf4=$suf4. + done + + trap 'rm -f "$1.$suf1" "$2.$suf2" "$1.$suf3" "$2.$suf4"' 0 1 2 15 + + echo stripping off .eh_frame, then retrying >&2 + + if (objcopy -v) 2>&1 | grep -e "--remove-section" > /dev/null; then + objcopy --remove-section .eh_frame --remove-section .rel.eh_frame --remove-section .rela.eh_frame "$1.$suf1" "$1.$suf3" + mv "$1.$suf3" "$1.$suf1" + + objcopy --remove-section .eh_frame --remove-section .rel.eh_frame --remove-section .rela.eh_frame "$2.$suf2" "$2.$suf4" + mv "$2.$suf4" "$2.$suf2" + elif (strip --help) 2>&1 | grep -e --remove-section > /dev/null; then + cp "$1.$suf1" "$1.$suf3" + strip --remove-section .eh_frame --remove-section .rel.eh_frame --remove-section .rela.eh_frame "$1.$suf3" + mv "$1.$suf3" "$1.$suf1" + + cp "$2.$suf2" "$2.$suf4" + strip --remove-section .eh_frame --remove-section .rel.eh_frame --remove-section .rela.eh_frame "$2.$suf4" + mv "$2.$suf4" "$2.$suf2" + else + echo failed to strip off .eh_frame >&2 + fi + + trap 'rm -f "$1.$suf1" "$2.$suf2"' 0 1 2 15 + + if cmp "$1.$suf1" "$2.$suf2"; then + status=0 + else + status=1 + fi + fi +fi + +$rm "$1.$suf1" "$2.$suf2" + +trap "exit $status; exit" 0 1 2 15 + +exit $status |